[AZ-Observing] Re: Rapid motion binary stars

Hi Steve,

Did you check zeta Aqr? I have PA of 180, shows 249 in DS list v.1 (1990).

Jack 


>Howdy all;
 

I am working on an update of the SAC double star database and need some
double checking, please.  I have used Brian Workman's double star calculator
Excel spreadsheet program to determine the motion in the future of some
famous doubles.  I know that a few of you use the program to determine the
orbit of stars, would you please check these and make certain that the notes
I have written are accurate.

 

The motivation here is that the old SAC double star data was rarely used.
So, instead of creating a huge database of over 10,000 stars by paring down
the WDS, we decided to put together some smaller lists from people who enjoy
doubles and have created smaller lists that we could combine.  That is the
plan.

 

We have used the SAC double star list, the Mullaney and McCall articles from
sky and Tell, and several other lists to create a database of over 1500
multiple stars at this point.

 

So, take a look at these and see if you agree with what I have written.  

 

Thanks for your time and effort;

Steve Coe

 

 

Eta Cas  Opening until 2127; then sep 14.8'' ;  PA 5.6

          Now--sep 13.1'' ;  320 deg PA

 

Iota Leo  Opening until 2064; then sep 2.7'' ; PA 70

           Now--sep 1.9'' ;  109 deg PA

 

Gamma Vir  Closing until 2008; then sep 0.4'';  PA 109; rapid opening after
2008

           Now--sep 0.6'';  209 deg PA

 

78 UMa    Closing until 2027; then sep 0.4'';  PA 196 deg; slow opening
after 2027 

         Now--sep 1.4'';  89.7 deg PA

 

44 Boo   Opening until 2007; Closest in 2034; then sep 0.26''

         Now--sep 2.4'';  55.7 deg PA

 

Lambda OPH  Opening until 2008; little change in separation; PA 36 deg

            Now--1.6'' ; 35 deg

 

Zeta Her   Opening until 2024; then sep 1.6'' ; PA 87 deg

            Now--1.1'' ; 210 deg

 

mu Dra   Opening until 2262; then sep 5.7'' ; PA 273 deg

         Now--2.3'' ; 10 deg

 

70 Oph   Opening until 2024; then sep 6.7'' ; PA 118 deg

        Now--5.2'' ; 136 deg

 

Alpha Psc  Closing until 2109; then sep 0.7'' ; PA 140 deg

          Now--1.8'' ; 267 deg

 

Sirius   Opening until 2026; then 11'' ; PA 57 deg

        Now--7.4'' ; 104 deg

 

Alpha Cen  Closing to 2038; then 1.8'' ; PA 95 deg

          Now--9.4''; 233 deg

 


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